Answer:
Area = 374.1 sq. in.
Explanation:
A trick to solve this would be to know the area of a hexagon formula and plug the known information.
First, of all, if we count the number of sides, we see that we have 6 sides.
6 sided polygon is a HEXAGON, which has area formula of:

Where
a is the side length
Given, the side length is 12 inches ( a= 12), we simply substitute into formula and find area of hexagon shown:

Rounded to nearest tenth (1 decimal place)
Area = 374.1 sq. in.